Hi @Tek! This is Jelica from the support team. Can you tell us more about the plane page you are referring to? For the zoom in and zoom out, this depends on the device/computer you are using. Are you using a trackpad or mouse? You should be able to see the zoom settings on the lower right side of the mural.
Thank you for getting back to me.
I found the problem- it is google chrome's issue, I tried Mural App in Firefox and I can see now all the tools including the Zoom options. Not sure why Google Chrome hides all the interface tools?